function button()
    {
        var menu = document.getElementById('mnu');
        var links = menu.getElementsByTagName('A');
        for(var i = 0; i < links.length; i++)
        {
            if(links[i].childNodes.length > 1)
            {
                if(links[i].childNodes[0].src.indexOf("images/button.gif") != -1)
                {
                links[i].onmouseover = function(){this.childNodes[0].src = "images/onbutton.gif"};
                links[i].onmouseout = function(){this.childNodes[0].src = "images/button.gif"};    
                }
                else
                {
                
                links[i].onmouseover = function(){this.childNodes[0].src = "images/onbuttons.gif"};
                links[i].onmouseout = function(){this.childNodes[0].src = "images/buttons.gif"};                
                
                }                       
            }
        }
    }